Spring winding tool



1936. J. BLANER SPRING WINDING TOOL Filed April 10, 1955 Aug. z5,

INVENTOR ATTORNEYS Patented Aug. 25, 1936 UNITED STATES PATENT OFFICE 1Claim.

This invention relates to a tool especially adapted for the constructionof coil springs and has for the primary object the provision of aportable device which may be easily applied and supported by a vise andlike device and is so constructed that it may be manually operated andadjusted to form springs of any desired pitch either of the coiledcompression or extension types and is capable of coiling either squareor round wire of any length and gauge.

With these and other objects in view this invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa perspective View illustrating a tool constructed in accordance with myinvention.

I Figure 2 is a vertical sectional View illustrating the same.

Figure 3 is a side elevation illustrating the tool supported by a vise.

Figure 4 is a detail sectional View illustrating the mounting of themandrel to the holder or body of the tool.

Figure 5 is a detail longitudinal sectional view showing the adjustablespring pitch device and also illustrating the wire feeder or guide tothe mandrel.

Referring in detail to the drawing, the numeral I indicates a body orholder of the tool which has one end reduced, as shown at 2, to bereceived between and gripped by jaws of a vise 3 as disclosed by Figure3. The holder or body I is of substantially rectangular shape in crosssection and when in use is supported vertically by the vise. A chamber 4is formed in the body and opens outwardly through the lower end of thelatter. Opposite Walls of the body are provided with mandrel receivingopenings 5 which communicate with the chamber 4 and in which isrotatably mounted a mandrel 6. The mandrel is engaged by a jaw lslidably mounted in the chamber 4 and is adjusted towards the mandrel bya set bolt threaded to the body. The active face of the jaw l issubstantially V-shaped, as

shown in Figure 4, and the lower walls of the openings 5 arecorrespondingly shaped so that the mandrel may be eifectively supportedfor rotation with endwise movement and with a desired drag thereon. Apin or handle 9 is secured to the jaw and extends through a slot Ill inthe body for lifting the jaw l away from the mangrel after the jaw hasbeen released by the set olt 8.

A lever II is apertured to receive the mandrel and is removably securedto said mandrel by a 5 set bolt I2. The lever II has a handle I3 wherebythe mandrel may be conveniently rotated. The lever II adjacent theapertures thereof is provided with an enlargement to receive a set boltI 4 .and said enlargement is provided With 10 an opening I5 to receiveone end of a wire to be coiled about the mandrel. The set bolt I4 may beadjusted for securing the wire in the opening I5.

The body I adjacent the mandrel is provided l5 with an opening toreceive a bolt I6 carrying spaced washers I1 to form a guide in thefeeding of the wire onto the mandrel. By adjusting the bolt I6 in theopening of the body the grip of the washers Il on the wire may bevaried. 20

An adjusting bolt I8 is threaded to the body and has an annular collarI9 fitting in a notch 20 of a slidably mounted adjusting bar 2I. Theadjusting bar parallels the mandrel and is slidably supported by thebody I and has removably 25 secured to one end a Wire engaging plate 22.The plate 22 has an inclined face or edge 23 engageable with the mandreland also a convolution of the wire upon the mandrel. By adjusting theposition of the plate 22 relative to the 30 wire feeder the relations ofthe convolutions relative to one another being formed in the wire on themandrel can be varied so that the convolutions rnay be formed ofdifferent pitches. The plate 22 with its adjusting means forms a pitch35 varying device and permits the forming of coil springs of differentpitches upon the mandrel.

In operation, wire of a selected gauge and shape is passed through thewire feeder and secured to the lever I I and by rotating the mandrel 40through the lever II the Wire will be caused to coil about the mandreland by adjusting the pitch means the coil spring formed on the mandrelfrom said wire may be made of a desired or selected pitch. 45

Having described the invention, I claim:

A spring winding tool comprising a body having a chamber and providedwith openings in opposite walls communicating with the chamber,

a mandrel mounted in said openings for rotat- 50 able and slidablemovements, a jaw slidably mounted in the chamber to engage the mandrel,means for adjusting the jaw against the mandrel to permit rotation andendwise sliding movements thereof, a lever for rotating the mandrel 55and adjustably and detachably connected to the latter, a wire guidecarried by the body for directing a wire onto the mandrel, means forconnecting one end of the Wire to the lever, a bar slidably mounted onthe body and having a notch, a pitch varying plate carried by one end ofsaid bar and engageable with the Wire on the mandrel, and an adjustingbolt threaded to the body and having an annular ange extending into thenotch whereby the pitch varying plate may be adjusted endwise of themandrel in either direction.

JOHN BLANER.

